The mesh of the rice screen is too small. The reason why rice polisher always sticks to the screen is that the screen hole of the rice screen is too small, which increases the friction resistance in the inner cavity of the rice polisher, slows down the movement speed of rice grains, prolongs the whitening time of rice grains in the rice polisher, increases the rice temperature, and causes the upper cover of the rice polisher to heat up, resulting in the temperature of the spindle bearing rising and burning, and the rice polisher will stick to the screen. The main function of rice polisher is to remove chaff powder adhered to the surface of white rice. There is a waxy protective layer on the polished surface of rice, which can not only prevent rice bran from adhering or rice flour from falling off in all aspects of production, storage, transportation and sales, but also ensure the cleanliness and hygiene of rice, and improve the quality and commodity value of finished rice.